<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>音乐盒</title>
    <link rel="stylesheet" href="css/main.css">
</head>
<body>
<div class="bg"></div>
<div class="help">
    <span class="icon"></span>
    <div class="popop">
        <div class="box">
            <div class="close">×</div>
            <h2>乐谱编写说明</h2>
            <ul class="content">
                <li>1. 低音由低到高分别依次对应小写字母（c,d,e,f,g,a,b）</li>
                <li>2. 中音由低到高分别依次对应数字（1,2,3,4,5,6,7）</li>
                <li>3. 高音由低到高分别依次对应大写字母（C,D,E,F,G,A,B）</li>
                <li>4. <span>空格</span>代表四分音符时值，<span>符号"-"</span>代表八分音符时值，<span>符号"="</span>代表十六分音符时值</li>
                <li>5. 音符紧挨一起则代表同时发声，可用于编写和弦</li>
            </ul>
        </div>
    </div>
</div>
<h2 class="title">音乐盒</h2>
<div class="music-box"></div>
<div class="chord"></div>
<div class="form">
    <div class="form-grp align-top">
        <label>类型：</label>
        <div class="type-list">
            <label class="type sine"><input name="type" type="radio" value="sine" />sine</label>
            <label class="type square"><input name="type" type="radio" value="square" />square</label>
            <label class="type triangle"><input name="type" type="radio" value="triangle" checked />triangle</label>
            <label class="type sawtooth"><input name="type" type="radio" value="sawtooth" />sawtooth</label>
        </div>
    </div>
    <div class="form-grp align-top">
        <label for="music-text">乐谱：</label>
        <textarea id="music-text" placeholder="输入乐谱后按回车键即可播放音乐哦~"></textarea>
    </div>
    <div class="form-grp align-top">
        <label>曲目：</label>
        <div class="music-name"></div>
    </div>
    <div class="form-grp">
        <label>速度：</label>
        <input id="speed" type="range" min="60" max="120" step="5" value="60">
        <span id="speed-value">60</span>
        <span class="unit">bpm</span>
    </div>
</div>
<script src="scripts/main.js"></script>
</body>
</html>